Discover the opportunities of CO2 refrigerationSafe – Efficient - Green

Brochure | Natural refrigeration

One natural and efficient system for all your cooling and heating needs

refrigerants.danfoss.com/co2

CO2 - one solution across all climatesWith heat reclaim, parallel compression and ejector technology, CO

2 has become highly

efficient in all climates.

CO2 – lowest possible Global Warming Potential (GWP)Zero ozone depletion and lowest possible GWP (equal to one).

Global Sustainable

Why choose CO2 transcritical refrigeration?With the implementation of refrigerant regulations like the Kigali amendment to the Montreal Protocol(Global) and F-gas regulative (Europe), the quest for alternative solutions is accelerating. CO

2 is now

recognized as the most viable and efficient solution among natural refrigerants in food retail.

Today, CO2 refrigeration has matured and is widely used in all types of stores from

hyper and supermarkets to convenience stores and discounters. Every day, progress is being made to invent components and configurations for sustainable and viable CO

2 refrigeration; not only in cold climates where heat reclaim has proved to be an

excellent business case, but also in warmer climates, where technology like ejectors constantly improve the energy efficiency of CO

2 systems.

Danfoss leads the development of solutions and components for CO2 refrigeration

and offers a wide range of products specifically designed for CO2 transcritical

systems. Furthermore, Danfoss provides training, design tools and consulting services to promote the use of CO

2 and to support the development of forward

thinking solutions in all parts of the value chain.

2

CO2 – smart solutions for high efficiencyWith the latest technology, transcritical booster systems outperform traditional HFC systems on energy efficiency in all climates.

Danfoss has provided controls to more than 10,000 transcritical CO2 systems worldwideDanfoss commercialized the first transcritical controls 10+ years ago and uses the experience to continue to bring robust and innovative solutions to the market.

Energy Efficient Proven

Facts about CO2• Environmentally friendly with up to 4,000 times lower GWP than traditionally used

synthethic refrigerants, non-toxic and non-flammable• Superior thermo-physical properties and high volumetric efficiency • High heat transfer efficiency

In 2016, negotiators from 197 countries reached a historic agreement to reduce emissions of HFCs that contribute to global warming. The Kigali pact represents a major expansion of the 1987 Montreal Protocol, which curbed the use of ozone-depleting CFC gases. With European F-gas and American SNAP regulation already in place, the Kigali agreement will further push the development of alternative refrigerants, where CO

2 already holds a strong position in several cooling

applications that are safe for the climate as well as for the ozone layer.

Historical agreement

Worldwide:

• Global HFC phase down under the Montreal Protocol from 2019 ending with 85 % cut down in 2047• National tax schemes on HFC• National incentives and subsidies

Multilateral Fund supports lowGWP projects

HFC phase down starting in 2015ending with 79% cut down i 2030

SNAP delisting of several HFC refrigerants like R404A starting in 2016

Extended new framework lawpromoting low GWP refrigerants

North America

Europe

Africa

South America

Middle East AsiaJapan

3

10,000+ Transcritical CO

2

racks installed with Danfoss controls

4

Transcritical CO2 - Reduce complexity with one, global solutionToday, CO

2 has proved itself as a highly reliable and cost effective solution

in all climates. For retailers, this means that transcritical CO2 low and

medium temperature refrigeration can be applied across the store, reducing complexity and cost during design, operation and maintenance.

For a decade or more, the potential of CO2 in supermarket refrigeration has

been recognized in colder climates. In recent years, however, the interest from forward-thinking retailers has fueled the invention of new technologies that make transcritical CO

2 systems in warmer climates both viable and profitable. New

technologies are rapidly emerging as highly energy efficient solutions that help retailers reduce complexity and meet current and future regulation on traditional refrigerants.

Simplify – apply CO2 to save costs

• Design replication across sites• Lower service costs• Easy knowledge sharing inside the organization and with external partners• Same KPIs, maximum transparency across the store • Enabling one install for Refrigeration, Heating and Air-condition

5

CO2 Parallel compressionCO2 Multi Ejector Solution

CO2 Booster

Annual Energy Savings vs. 404A30%

25%

20%

15%

-15%

10%

-10%

5%

-5%

0%

Sydn

ey

Sing

apor

e

Beiji

ng

Mos

cow

Lond

on

Mad

rid

Rom

e

Mon

trea

l

Sao

Paul

o

New

Yor

k

Mex

ico

city

Los

Ang

eles

Joha

nesb

urg

The warmer the better – Danfoss Multi Ejector opens new frontiers in CO

2 refrigeration

The ejector solutions are the next promising technologies for optimization of transcritical refrigeration in warm climates. The Multi Ejector allows retailers to go beyond ambient temperature limitations and use transcritical CO

2

across the globe.

The energy saving potential of the Multi Ejector solution is up to 10% on an annualized basis compared to the previous generation of transcritical booster systems. The greatest savings occur in the warmest ambient conditions. Compared to first generation systems, savings during the hottest hours of the year are up to 30%, meaning that significant savings in installed compressor capacity can be achieved, potentially reducing the overall cost of the system. In areas with variable electricity rates or with demand charges, the coincidental peak power savings are not to be ignored. Ejector technology is erasing the so-called CO

2

equator, making transcritical CO2 technology more efficient than state-of-the-art

HFC rack systems in all regions of the world.

6

Danfoss has tested the new ejector technology in labs and in more than 100 stores store installations. The test installations have returned significant energy savings compared to traditional HFCs.

10%saved on your refrigeration energy bill in the warmest climates

7

Now, thanks to a cooperation between Danfoss and Sønderborg District Heating, the Danish supermarket chain SuperBrugsen in Høruphav on the island of Als, Denmark, is also a district heating supplier. Residents living near Super Brugsen have their district heating supplied from the recovered surplus heat from the cooling system in SuperBrugsen, and thereby help contribute to reducing CO

2 emissions.

Local residents stay warm thanks to supermarket’s cooling system

20 % energy savings on heating with heat reclaim

8

Maximize energy efficiency with transcritical CO2 and heat reclaimCO

2 is by nature a highly suitable refrigerant for heat reclaim, and resilient

solutions already return significant energy savings to food retailers. New ejector technology for transcritical CO

2 systems already allows total

optimization of the refrigeration system with integration of auxiliary functions like air condition and high temperature heat recovery.

In theory, 100 % heat reclaim from the transcritical refrigeration system in many cases provides sufficient heat to fulfil demands for space heating and hot tap water in many climates.

Supermarkets become energy suppliersCO

2 transcritical refrigeration opens new perspectives, where supermarkets, when

connected to a district heating system, can play an important role in the local energy supply. With only minor investments, the supermarket can be connected to the local heating network and the supply of reclaimed heat can generate yet another revenue stream for the retailer.

9

Stop global warming – Supermarkets are part of the solutionSynthetic refrigerants like HCFCs and HFCs have global warming potentials between 2,000-4,000 times higher than that of CO

2. All too often,

refrigerant leakages from supermarkets result in harmful gas escaping to the atmosphere. If grocery stores across the world switched from synthetic refrigerants to CO

2, it would have the same environmental benefit as taking

10 million automobiles off the road.

A lot of forward-thinking retailers have already made the move to CO2. Are you the

next? Danfoss has implementation-ready CO2 solutions that will help you boost

the energy efficiency of your stores and the green image of your brand, services to promote the use of CO

2 and to support the development of forward thinking

solutions in all parts of the value chain.

Oneis the GWP of CO2

compared to 4,000 of traditional HFCs

10

CO2 - safe for the

climate and ozone layer• Commercial refrigeration accounts for more than 30 % of the total

refrigerant emissions in the world.• 50 million tons of carbon dioxide equivalent emissions could be saved every year if

all supermarkets worldwide were to switch to CO2 as refrigerant.

Iper in Italy opted for transcritical CO2 in their latest hypermarket in Milan.

“Electricity for refrigeration makes up 50 % of the total energy consumption of the hypermarket, and Iper has an ambition to cut down this consumption year by year as part of their sustainability program. Another ambition is to switch to natural refrigerants to cut the carbon footprint. In order to fulfil these goals, we proposed a transcritical CO

2 solution. It is a large installation with several hundred

cabinets and cold rooms operating under ambient temperatures up to 38°C”, says Enrico Zambotto, Technical Support Manager from Arneg, a world leader in the production of complete refrigeration solutions for the retail industry.

Italy’s Largest Hypermarket Opts for CO2 Refrigeration

11

Join us – and take the next step in CO

2 refrigeration

CO2 has become industry standard in food retail refrigeration. Proven

technology and components for transcritical refrigeration are readily available today.

• Which refrigerant gives us the best return on investment? • Can we achieve full integration of our energy requirements? • Should we do a full retrofit with CO

2 or just part of the system?

• Should we invest in heat reclaim? • Should we go for CO

2 ejectors?

The questions are many when food retailers have to navigate the highly dynamic and competitive market of today.

There is no one-size-fits-all answer and solution; the final decision always depends on specific and site-related circumstances. The Danfoss team of CO

2 champions is

ready to guide and support you in your decision-making.

Your benefits at a glance• CO

2 optimized controls for a multitude of systems, including the ability

to dynamically optimize transcritical CO2 performance

• Integrated heat recovery solution enabling delivery of full store demand for space heating and sanitary hot water

• Full line of valves and automatic controls capable of standstill pressures (90Bar/1300psi) and transcritical pressures (140Bar/2000psi) for trouble-free operation

• Industry leading application support and guidance to choose the best solution

Want to learn more about CO

2 refrigeration?

Danfoss offers a series of e-lessons:• Introduction to Carbon Dioxide: Properties and Impact• Advantages of Carbon Dioxide as a Refrigerant• System understanding• Phase change• Food Retail Systems and product selection

12

Danfoss has launched a Mobile CO2 Training Unit with

equipment and components for CO2 solutions. The Unit is

manned by dedicated Danfoss CO2 champions, and visitors

can view demonstrations and experience hands-on training with actual systems and interactive panels.

10,000 Danfoss transcriticalFood retail installsWorldwide

13

A high pressure regulating valve fitting transcritical CO

2 systems

offering unmatched regulating and benefits through full serviceability, including both a filter and a pressure transmitter.

The most used transcritical CO2

control valve. Featuring fullserviceability and offering hand held magnet control.

The Danfoss Multi Ejector is the latest edition to the Danfoss portfolio and ensures that transcritical CO

2 applications

for retailers become energy efficient in any climate.

The 3 way heat reclaim valve for CO

2 applications enables energy

savings by reclaiming heat in e.g. supermarket applications. This valve provides the tightest seal on the market, while at the same time ensuring the most accurate control and even the possibility for modulation between two heat exchangers.

Multi Ejector

CCMT ICMTS CTR

AKVH together with the AK-CC 550A evaporator controller is the most used solution in commercial CO

2 refrigeration

systems. Fail safe and filter build in.

AKVH

Our pledge to low-GWP refrigerantsDanfoss actively pursues development and use of low-GWP refrigerants to help slow the process of global warming while helping to ensure continued global well-being, economic development and future viability of our industry. We will enable our customers to achieve their low-GWP goals while continuing to enhance the energy efficiency of refrigeration and HVAC systems in food retail.

Full product portfolio for CO2 refrigeration

A multi suction grouptranscritical pack controller,offering supreme systemperformance and integrity by combining many years of experience in transcriticalcontrol with market leadinginnovative control features.

AK-PC 782A

14

Find out more about products and scan the QR code

AK-PC 782

NRV

GBC

AKVH

DMT

Gas cooler

Liquid receiver

Gas bypass

MT compressors

Medium temp. load

Filter drier

LT compressors

Low temp. load

Oil separator

Dan

foss

R64-

2105

.13_

App

l.3

AKS 11

AKS 21

AKS 2050

AKS 11

AKS 2050

AKS 11

AK-CC 550A AKS 11

AKS 2050

AKS 11

AKS 2050

AKS 2050

FC 103

AKS 11

AKS 32RAK-CC 550A

GBC

GD/DGS

AKVH

NRV

GBC

NRV

GBC

NRV

GBC

NRVAKS 11

GBC

NRV

GD/DGS

CCMT

AK-SM 8XX/AK-SM 350/AK-SM 720/AKA 245

HP High Pressure (120-140 bar)HP Receiver Pressure (60-90 bar)LP Suction Pressure MT (35-55 bar)LP Suction Pressure LT (25-30 bar)Oil lines

MT

IT ”parallel”compressors

LT

MultiEjector

FC 103

IT

FC 103

MBS8250Prec

Transcritical Booster System with Multi Ejector The latest generation of systems combines parallel compression and ejector technology to make transcritical CO

2 an efficient choice

15

Danfoss is committed to supporting food retailers working

to achieve climate-friendly and energy efficient solutions.

As a market leader with more than 50,000 food retail

installations worldwide, Danfoss leads the development

of food retail solutions. Our CO2 technologies are part

of the Danfoss Smart Store concepts developed

based on 30 years of close cooperation with the

global community of food retailers.

Danfoss continuously develops its portfolio

of components, controllers and advanced

algorithms with the long-term ambition to

create net-zero stores or even stores that

give more energy than they take. Together

with forward-thinking retailers around

the world, we take sustainable solutions

to the next level through constant

development of sustainable technologies

and service concepts.

Visit Danfoss Smart Store at:

smartstore.danfoss.com

Read more about trending CO2 technologies

for food retail refrigerants: danfoss.com/co2

CO2 refrigeration is part of Danfoss Smart Store

DKRCE.PB.000.U1.02 © Copyright | DCS (aa) | 2017.09